"Hello"

A man is at the supermarket when he notices that the rather good looking blonde behind him has just smiled and said "hello" to him.

He is rather taken aback that such a good looker would be waving to him; and, although familiar, he can't place where he might know her from; so he says "Sorry, do you know me?"

She replies, "I may be mistaken, but I think you might be the father of one of my children.

His mind shoots back to the one and only time he had been unfaithful.

"Holy Shit" he says, "are you that dirty stripper from my stag night that I screwed on the pool table in front of all my mates while your mate whipped me with your bra?"

"No" she replies, "I'm your son's English teacher." (",)